More companies are now viewing their DHCP infrastructures as critical aspects of their industrial network infrastructure as networks have grown in size and complexity.
A DHCP Option 82 relay agent receives a request for an IP address from a computer or DHCP client. The relay agent adds its own identifier (MAC address or IP address) and the port number where the client is connected to the request. The client request is forwarded to a DHCP option 82 server. The DHCP option 82 server then gives an IP address to the client base on the information. As long as the relay agent’s identifier and the port number that the client connections have not changed, the client will always get a fixed IP address. It provides an easy way to locate which port a client is attached to by tracking down an IP address allocated by a DHCP server.
The Port-based DHCP simply assigns an IP address to a client according to the port number where the client was attached to. This feature fits for one level network structure, and eliminates the need of a DHCP option 82 relay agent and a DHCP option 82 server. For example, a DHCP relay agent itself can get a fixed IP from the DHCP server without another DHCP relay agent in between.
Advanced DHCP Server, DHCP Option 82 together with Port-based DHCP
As shown in the typical IP surveillance application above, with the advanced DHCP server, not only can the IP cameras A, B, C and D get the same IP address assigned by the DHCP server when the IP camera changes, the DHCP relay also gets the same IP address assigned by the DHCP server when the DHCP relay changes.
Advantage of ADVANCED DHCP
The advanced DHCP is the best and most popular solution for automated configuration of networking devices where a large number of IP addresses are needed; it results in significant benefits these include:
• Providing further implementation flexibility for operators;
• Providing additional security and convenience in industrial network infrastructures, such as a typical IP surveillance application;
• Provide an easy way to locate what port a client is attached to by tracking down an allocated IP address;
• Reduce the number of addresses needed, the Advanced DHCP sever allocates IP addresses from a shared pool, which removes the need for administrators to manually configure an address for each new users.
Korenix Technology (korenix.com), a Beijer Electronics Group Company, is devoted to designing and manufacturing high quality Industrial Networking & Computing Products to ensure the high quality and reliability of industrial networks. Korenix solutions encompass the Industrial IEEE 802.3af PoE and IEEE 802.3at High power PoE Switches, Industrial L2 / L3 Rackmount / Rail Ethernet Switches and IP67/ 68 Waterproof Ethernet Switches, Long Distance Wireless Outdoor APs and Embedded Networking Routing Platforms, etc.
Korenix Technology, A Beijer Electronics Group Company.